Patents Assigned to A. Ahlstrom Osakeyhtio
  • Patent number: 3942786
    Abstract: After a cutter cutting sheets out of a travelling web has been arranged a pair of drive rollers rotated at a linear velocity at least equal to that of the web. The sheets are thrown by the pair of drive rollers and received and further delivered to a laying station by conveying means operated at a velocity lower than that of the drive rollers so as to cause the sheets to assume a partially overlapping relationship. After the drive rollers there is preferably arranged guide means for forcing the trailing edge of the sheet downward to enable the leading edge of the next sheet freely to pass over said trailing end.
    Type: Grant
    Filed: August 9, 1971
    Date of Patent: March 9, 1976
    Assignee: A. Ahlstrom Osakeyhtio
    Inventor: Unto Antero Lauren
  • Patent number: 3941435
    Abstract: Disclosed is a roller with an outer mantle and an inner shaft, the middle part outer diameter of the inner shaft being greater than the outer diameter of its other parts and the outer mantle having been joined by shrinking to the middle part of the inner shaft. The outer mantle parts being supported by the greater diameter middle part of the inner shaft and consisting of two pipes welded together, the ends of the mantle have been thinned on the inside so that their inner diameter is the same as the outer diameter of the inner shaft middle part and the combined length of the outer mantle is the same as the length of the middle part of the inner shaft. In addition the middle part of the inner shaft has been fitted so that when said pipes are welded together the middle part is pressed between the shoulders of the thinned parts of the outer mantle.
    Type: Grant
    Filed: January 27, 1975
    Date of Patent: March 2, 1976
    Assignee: A. Ahlstrom Osakeyhtio
    Inventor: Jorma Aarne Kullervo Tuomaala